JP7789085B2 - Non-combustion heating stick - Google Patents

Description

The present invention relates to a non-combustion heating stick.

Patent Document 1 describes a smoke filter for smoking articles, which comprises a porous carbon material having a BET surface area of at least 800 m ² /g, a pore structure including mesopores and micropores, and a pore volume measured by a nitrogen adsorption method of at least 0.9 cm ³ /g, wherein a) the porous carbon material has a bulk density of 0.5 g/cc or less, and/or b) 15 to 65% of the pore volume of the porous carbon material measured by a nitrogen adsorption method is mesopores.
Patent Document 2 also describes a smoking article comprising a smokable material and an activated carbon material downstream of the smokable material, wherein the activated carbon material has a fine micropore volume to total micropore volume ratio of about 0.9 or less, and the activated carbon material contains surface oxygen at a concentration of about 5,000 micromoles/gram or less as determined by temperature programmed desorption.
Although Patent Documents 1 and 2 use porous carbon materials and activated carbon materials, the specific descriptions and examples all refer to combustible tobacco products.

Special Publication No. 2008-535754 Special table 2017-510266 publication

Non-combustion heat-and-release sticks generate aerosol by heating a substrate containing an aerosol source. Compared to combustible cigarettes, the substrate is heated to a lower temperature, so the effects of flavor-blocking compounds such as aldehydes have not been studied. However, low heating temperatures make it difficult to reproduce tobacco-like flavors, and it has become necessary to increase the heating temperature to improve user satisfaction with the flavor.
The present invention aims to remove flavor and taste inhibiting components such as aldehydes from non-combustion heat-type sticks heated to high temperatures while maintaining user satisfaction with the smoking taste.

The first feature of the present invention, which was completed with this object in mind, is a non-combustion heating stick comprising: a substrate containing an aerosol source; a cooling section that generates an aerosol by cooling vapor generated by heating the substrate; and a filter section that is placed in a location where the aerosol passes, wherein the filter of the filter section contains activated carbon, the activated carbon having a pore volume of 0.2 ^cm3 /g to 0.9 cm3 ^/ g for pores with a pore diameter of 50 nm to 5000 nm, the amount of activated carbon added to the filter section being 10.5 mg to 22.0 mg, the value of (specific surface area of activated carbon × weight of activated carbon) / (cross-sectional area perpendicular to the air passage direction of the filter) being 15.0 ^m2 / ^cm2 to 80.0 ^m2 / ^cm2 , and the amount of activated carbon added per unit length in the air passage direction of the filter being 5 mg/cm to 50 mg/cm.
A second feature of the activated carbon may be that the ratio of the volume of pores having a diameter of 50 nm or more and 5000 nm or less to the volume of all pores having a diameter of 5000 nm or less may be 15% or more.
A third feature of the activated carbon may be that a ratio of a volume of pores having a diameter of less than 2 nm to a volume of all pores having a diameter of 5000 nm or less is 70% or less.
A fourth feature is that the activated carbon may have a BET specific surface area of 600 m ² /g or more and 1800 m ² /g or less.

According to the first feature, it is possible to provide a non-combustion, heat-type stick that preferentially removes flavor-inhibiting components such as aldehydes while maintaining user satisfaction with the smoking taste.
According to the second feature, a non-combustion heating stick can be provided that has a higher affinity with aerosols and can have a positive effect on the aroma and taste, etc., compared to when activated carbon is used in which the ratio of the pore volume with pore diameters of 50 nm or more and 5000 nm or less to the total pore volume with pore diameters of 5000 nm or less is less than 15%.
According to the third feature , a non-combustion, heat-type stick can be provided that can selectively reduce flavor and taste-inhibiting components such as aldehydes, compared to when activated carbon is used in which the ratio of pore volume with a pore diameter of less than 2 nm to the total pore volume with a pore diameter of 5,000 nm or less exceeds 70%.
According to the fourth feature, a non-combustion heating stick can ^{be provided that can selectively reduce flavor and taste inhibiting components such as aldehydes, compared to when using activated carbon with a BET specific surface area of less than 600 m 2 /} g or more than 1800 m 2 /g.

1 is a diagram showing a longitudinal section of a non-combustion heating stick according to a first embodiment. FIG. 1 is a schematic diagram illustrating an example of the configuration of a suction device according to a first embodiment. FIG. FIG. 10 is a schematic diagram showing a vertical cross section of a filter part of a non-combustion heating stick according to another embodiment.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In each drawing, the same parts are designated by the same reference numerals.

<Non-combustion heating stick>
Fig. 1 is a diagram showing a vertical cross section of a non-combustion heating type stick 1 according to the first embodiment. Fig. 2 is a schematic diagram showing an example of the configuration of a suction device 100 according to the first embodiment.
The non-combustion heating stick (hereinafter, sometimes referred to as a "stick") 1 according to the first embodiment includes a substrate 10, a cooling section 20, and a filter section 30. The substrate 10 is formed in a cylindrical shape. Hereinafter, the direction of the center line CL of the substrate 10 may be referred to as the "center line direction." The stick 1 further includes tipping paper 40, which integrates the substrate 10, the cooling section 20, and the filter section 30 by winding them in this order along the center line direction. Hereinafter, one end side along the center line direction (the left side in FIG. 1 ) may be referred to as the first side, and the other end side along the center line direction (the right side in FIG. 1 ) may be referred to as the second side. The first side is the end side inserted into the inhaler 100. The second side is the end opposite the first side, which is the end side held in the user's mouth for inhalation. Furthermore, a cross section along the center line direction is referred to as a "longitudinal cross section," and a cross section cut along a plane perpendicular to the center line direction is defined as a "transverse cross section."

[Usage of stick 1]
The stick 1 according to the first embodiment is used in a non-combustion/heating suction device 100. As shown in FIG. 2 , the suction device 100 includes a power supply unit 111 that stores power and supplies power to each component of the suction device 100, a sensor unit 112 that detects various information related to the suction device 100, and a notification unit 113 that notifies the user of the information. The suction device 100 also includes a memory unit 114 that stores various information for the operation of the suction device 100, a communication unit 115 that transmits and receives information between the suction device 100 and other devices, and a control unit 116 that controls the overall operation of the suction device 100. The suction device 100 also includes a heating unit 121 that heats the stick 1, a holding unit 140 that holds the stick 1, an opening 142 that connects the internal space 141 to the outside, and a heat insulating unit 144 that prevents heat transfer from the heating unit 121 to other components of the suction device 100. In the suction device 100, the user inhales the stick 1 while it is held in the holding unit 140.

The heating unit 121 heats the base material 10 of the stick 1. The heating unit 121 is made of any material, such as metal or polyimide. For example, the heating unit 121 is configured in a film-like form and is arranged to cover the outer periphery of the holding unit 140. When the heating unit 121 generates heat, the aerosol source 11 (omitted from FIG. 2 ) included in the stick 1 is heated from the outer periphery of the stick 1. The heating unit 121 generates heat when power is supplied from the power supply unit 111. As an example, power may be supplied when the sensor unit 112 detects that a predetermined user input has been made. When the temperature of the stick 1 heated by the heating unit 121 reaches a predetermined temperature, the user can inhale. Thereafter, when the sensor unit 112 detects that a predetermined user input has been made, power supply may be stopped. As another example of usage, power may be supplied and aerosol may be generated during the period in which the sensor unit 112 detects that the user has inhaled.

The insulating section 144 is arranged to cover at least the outer periphery of the heating section 121. For example, the insulating section 144 may be made of vacuum insulation material, aerogel insulation material, or the like. Note that vacuum insulation material is an insulating material in which, for example, glass wool and silica (silicon powder) are wrapped in a resin film and placed in a high vacuum state, thereby reducing the thermal conduction of gases to as close to zero as possible.

[Base material part 10]
The substrate 10 includes an aerosol source 11 that generates vapor that generates an aerosol when heated, and a cigarette paper 12 that covers the outer periphery of the aerosol source 11. The substrate 10 in FIG. 1 is an example of a substrate including an aerosol source. The substrate 10 is formed into a cylindrical shape by wrapping the aerosol source 11 around the cigarette paper 12. The aerosol source 11 may be derived from tobacco, such as a processed product obtained by molding tobacco shreds or tobacco raw materials into granules, sheets, or powder. The aerosol source 11 may also include non-tobacco-derived materials made from plants other than tobacco (e.g., mint, herbs, etc.). For example, the aerosol source 11 may include a flavoring component such as menthol. When the inhalation device 100 is a medical inhaler, the aerosol source 11 may include a medication to be inhaled by the patient. The aerosol source 11 is not limited to a solid, but may also be a liquid such as a polyhydric alcohol such as glycerin or propylene glycol, or water. At least a portion of the substrate 10 is housed in the internal space 141 of the holder 140 when the stick 1 is held by the holder 140 shown in FIG.

It is preferable that the substrate portion 10, which is formed by wrapping the aerosol source 11 in wrapping paper 12, has a cylindrical shape that satisfies the aspect ratio defined in mathematical formula 1 of 1 or more.

In Equation 1, w is the width of the cross section of the substrate 10, h is the size of the substrate 10 in the centerline direction, and it is preferable that h≧w. The shape of the cross section is not limited and may be polygonal, rounded polygonal, circular, elliptical, etc., and the width w is the diameter if the cross section is circular, the major axis if the cross section is elliptical, or the diameter of the circumscribed circle or the major axis of the circumscribed ellipse if the cross section is polygonal or rounded polygonal. The width of the aerosol source 11 constituting the substrate 10 is preferably 4 mm or more and 9 mm or less.

The size of the substrate 10 in the center line direction can be changed appropriately according to the size of the product, but is usually 10 mm or more, preferably 12 mm or more, more preferably 15 mm or more, and even more preferably 18 mm or more. The size of the substrate 10 in the center line direction is usually 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and even more preferably 25 mm or less.
In addition, the ratio of the size of the substrate 10 to the size of the stick 1 in the center line direction is not particularly limited, but from the viewpoint of the balance between the delivery amount and the aerosol temperature, it is usually 10% or more, preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more. In addition, the ratio of the size of the substrate 10 to the size of the stick 1 is usually 80% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less.

The amount of aerosol source 11 contained in the substrate 10 is not particularly limited, but may be 200 mg or more and 800 mg or less, and preferably 250 mg or more and 600 mg or less. This range is particularly suitable for a substrate 10 having a circumference of 22 mm and a size in the centerline direction of 20 mm.

Here, the aerosol source 11 containing tobacco shreds will be described. The material of the tobacco shreds contained in the aerosol source 11 is not particularly limited, and known materials such as lamina or ribs can be used. Alternatively, the aerosol source 11 may be a shredded tobacco pulverized product obtained by pulverizing dried tobacco leaves to an average particle size of 20 μm to 200 μm, homogenizing the pulverized tobacco, and processing it into a sheet (hereinafter simply referred to as a "homogenized sheet"). Furthermore, the aerosol source 11 may be a so-called strand type, in which a homogenized sheet having a size approximately the same as the size of the substrate 10 in the center line direction is shredded approximately parallel to the center line direction of the substrate 10 and filled with the homogenized sheet.
Furthermore, the width of the tobacco shreds is preferably 0.5 mm or more and 2.0 mm or less in order to fill the aerosol source 11 .

Various types of tobacco can be used for the tobacco shreds and homogenized sheet production. Examples include flue-cured tobacco, burley, oriental, native tobacco, other Nicotiana tabacum varieties, Nicotiana rustica varieties, and mixtures thereof. Mixtures can be appropriately blended to achieve the desired flavor. Details of tobacco varieties are disclosed in the "Encyclopedia of Tobacco," Tobacco Research Center, March 31, 2009. There are several conventional methods for producing homogenized sheets, i.e., grinding tobacco leaves and processing them into homogenized sheets. The first method is to produce a paper-making sheet using a papermaking process. The second method involves mixing a suitable solvent, such as water, with ground tobacco leaves to homogenize them, then casting a thin layer of the homogenized material onto a metal plate or metal belt and drying it to produce a cast sheet. The third method involves mixing a suitable solvent, such as water, with ground tobacco leaves to homogenize them, and then extruding the mixture into a sheet to produce a rolled sheet. Details of the types of homogenizing sheets are disclosed in "Encyclopedia of Tobacco, Tobacco Research Center, March 31, 2009."

The moisture content of the aerosol source 11 can be 10% by mass or more and 15% by mass or less, and preferably 11% by mass or more and 13% by mass or less, based on the total amount of the aerosol source 11. Such a moisture content suppresses the occurrence of stains on the substrate 10 and improves its suitability for winding during production.

The aerosol source 11 is not particularly limited and may contain extracts from various natural products and/or their constituents depending on the intended use. Examples of the extracts and/or their constituents include glycerin, propylene glycol, triacetin, 1,3-butanediol, and mixtures thereof.
The content of the extract and/or its constituent components in aerosol source 11 is not particularly limited, but from the viewpoint of generating a sufficient aerosol and imparting a good flavor, it is usually 5% by mass or more, and preferably 10% by mass or more, relative to the total amount of aerosol source 11. Furthermore, the content of the extract and/or its constituent components in aerosol source 11 is usually 50% by mass or less, and preferably 15% by mass or more and 25% by mass or less.

The aerosol source 11 may contain a flavoring. The type of flavoring is not particularly limited, but menthol is particularly preferred from the viewpoint of imparting a good flavor. These flavorings may be used alone or in combination of two or more.
The packing density of the aerosol source 11 is not particularly limited, but is usually 250 mg/cm ^or more, and preferably 300 mg/cm ^or more, from the viewpoint of ensuring the performance of the stick 1 and imparting a good flavor. The packing density of the aerosol source 11 is usually 400 mg/cm ^or less, and preferably 350 mg/cm ^or less.

The aerosol source 11 may also be made of a tobacco sheet. The number of tobacco sheets may be one, or two or more.
In the case where the aerosol source 11 is composed of a single tobacco sheet, for example, the tobacco sheet may be filled with a tobacco sheet having one side approximately the same size as the centerline of the filling material, folded multiple times horizontally in the centerline of the filling material (so-called gathered sheet).In addition, the tobacco sheet may be filled with a tobacco sheet having one side approximately the same size as the centerline of the filling material, wound in a direction perpendicular to the centerline of the filling material.

In the case where the aerosol source 11 is composed of two or more tobacco sheets, for example, multiple tobacco sheets, each having a side approximately the same size as the center line of the filled material, are packed in a state where they are wound in a direction perpendicular to the center line of the filled material so that they are arranged concentrically.
"Concentrically arranged" means that the centers of all the tobacco sheets are arranged at approximately the same position. The number of tobacco sheets is not particularly limited, but examples include two, three, four, five, six, or seven sheets.
Two or more tobacco sheets may all have the same composition or physical properties, or some or all of the tobacco sheets may have different compositions or physical properties. Furthermore, the thicknesses of the tobacco sheets may be the same or different.
There are no limitations on the thickness of each tobacco sheet, but in terms of the balance between heat transfer efficiency and strength, it is preferably 150 μm or more and 1000 μm or less, and more preferably 200 μm or more and 600 μm or less.

The aerosol source 11 can be manufactured by preparing a plurality of tobacco sheets of different widths, stacking them so that the width decreases from the first side to the second side to prepare a laminate, and passing this through a winding tube to roll up and form it.
According to this manufacturing method, a plurality of tobacco sheets extend in the centerline direction and are arranged concentrically around the centerline CL.
In this manufacturing method, the laminate is preferably prepared so that non-contact portions are formed between adjacent tobacco sheets after rolling. The presence of non-contact portions (gaps) between multiple tobacco sheets where the tobacco sheets do not come into contact ensures flavor flow paths and improves the delivery efficiency of flavor components. On the other hand, heat from the heater can be transferred to the outer tobacco sheets via the contact portions between the multiple tobacco sheets, ensuring high heat transfer efficiency.
In order to provide non-contact portions between multiple tobacco sheets where the tobacco sheets do not come into contact, examples of methods for preparing a laminate include using embossed tobacco sheets, laminating adjacent tobacco sheets without bonding the entire surfaces of the sheets together, laminating adjacent tobacco sheets with only a portion of the sheets bonded together, or laminating adjacent tobacco sheets with only a light bonding of the entire surfaces or a portion of the sheets together so that they can be peeled off after rolling and molding.
When preparing the substrate 10 including the wrapping paper 12, the wrapping paper 12 may be disposed on the end surface of the first side of the laminate.

Polyols such as glycerin, propylene glycol, and 1,3-butanediol may be added to the tobacco sheet. The amount of polyol added to the tobacco sheet is preferably 5% by mass or more and 50% by mass or less, and more preferably 15% by mass or more and 25% by mass or less, based on the dry mass of the tobacco sheet.

The tobacco sheet can be appropriately produced by known methods such as paper making, slurry, rolling, etc. The above-mentioned homogenized sheet can also be used.
In the case of papermaking, tobacco can be produced by a method including the following steps: 1) Dried tobacco leaves are roughly crushed and extracted with water to separate the water extract and residue; 2) The water extract is dried and concentrated under reduced pressure; 3) Pulp is added to the residue, which is then fiberized in a refiner and made into paper; 4) A concentrated solution of the water extract is added to the paper-made sheet and dried to produce a tobacco sheet. In this case, a step of removing some components such as nitrosamines may be added (see JP-A-2004-510422).
In the case of the slurry method, tobacco can be produced by a method including the following steps: 1) mixing water, pulp, a binder, and crushed tobacco leaves; 2) spreading (casting) the mixture thinly and drying it. In this case, a step of irradiating the slurry of water, pulp, a binder, and crushed tobacco leaves with ultraviolet light or X-rays to remove some of the components such as nitrosamines may be added.

Alternatively, as described in WO 2014/104078, a nonwoven tobacco sheet can be used, which is produced by a method including the following steps: 1) mixing powdered tobacco leaves with a binder; 2) sandwiching the mixture between nonwoven fabrics; and 3) molding the laminate into a fixed shape by heat welding to obtain a nonwoven tobacco sheet.
The type of tobacco leaf material used in each of the above methods can be the same as that described for the aerosol source 11 containing shredded tobacco.
The composition of the tobacco sheet is not particularly limited, but for example, the content of tobacco raw material (tobacco leaves) is preferably 50% by mass or more and 95% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may also contain a binder, and examples of such binders include guar gum, xanthan gum, carboxymethyl cellulose, and sodium salts of carboxymethyl cellulose. The amount of binder is preferably 1% by mass or more and 10% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may further contain other additives. Examples of additives include fillers such as pulp.

The configuration of the cigarette paper 12 used in the substrate 10 is not particularly limited and can be any common configuration, for example, one containing pulp as the main component. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp commonly used in cigarette papers 12 for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto.
Usable types of pulp include chemical pulp produced by kraft cooking, acidic, neutral or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc.

The cigarette paper 12 is produced using pulp in a papermaking process using a Fourdrinier paper machine, a cylinder paper machine, a combined cylinder/short-cylinder paper machine, or the like, whereby the texture is adjusted and made uniform. If necessary, a wet strength agent can be added to impart water resistance to the cigarette paper 12, or a sizing agent can be added to adjust the printing quality of the cigarette paper 12. Furthermore, internal papermaking aids such as aluminum sulfate, various anionic, cationic, nonionic, or amphoteric retention aids, drainage aids, and paper strength agents, as well as papermaking additives such as dyes, pH adjusters, antifoaming agents, pitch control agents, and slime control agents, can be added.

The basis weight of the base paper for the cigarette paper 12 is, for example, usually 20 gsm or more, preferably 25 gsm or more, while the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less.
The thickness of the cigarette paper 12 is not particularly limited, and is usually 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more, from the viewpoints of rigidity, breathability, and ease of adjustment during papermaking. The thickness of the cigarette paper 12 is usually 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.
The shape of the wrapping paper 12 for producing the substrate 10 can be, for example, square or rectangular.
When used as the wrapping paper 12 for wrapping the aerosol source 11, the length of one side can be approximately 12 mm to 70 mm, and the length of the other side can be 15 mm to 28 mm, with the other side preferably being 22 mm to 24 mm, and more preferably being approximately 23 mm. When wrapping the aerosol source 11 in the wrapping paper 12 in a cylindrical shape, for example, an end of the wrapping paper 12 and an end of the wrapping paper 12 opposite it can be overlapped by approximately 2 mm in the circumferential direction and glued together to form a cylindrical paper tube shape in which the aerosol source 11 is filled. The size of the rectangular wrapping paper 12 can be determined depending on the size of the substrate 10.

In addition to the above-mentioned pulp, a filler may be contained in the cigarette paper 12. The content of the filler relative to the total mass of the cigarette paper 12 can be 10% by mass or more and less than 60% by mass, and preferably 15% by mass or more and 45% by mass or less.
In the cigarette paper 12, the filler content is preferably 15% by mass or more and 45% by mass or less within the preferred range of basis weight (25 gsm or more and 45 gsm or less).
Furthermore, when the basis weight is 25 gsm or more and 35 gsm or less, the filler content is preferably 15% by mass or more and 45% by mass or less, and when the basis weight is 35 gsm or more and 45 gsm or less, the filler content is preferably 25% by mass or more and 45% by mass or less.
As the filler, calcium carbonate, titanium dioxide, kaolin, etc. can be used, but calcium carbonate is preferably used from the viewpoint of enhancing flavor and whiteness.

Various auxiliary agents other than the base paper and fillers may be added to the cigarette paper 12. For example, a water resistance improver may be added to improve water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resins, melamine-formaldehyde resins, polyamide epichlorohydrin (PAE), etc. Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.
A paper strength agent may be added as an auxiliary, and examples thereof include polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that the use of a very small amount of oxidized starch improves air permeability (JP 2017-218699 A).

A coating agent may be applied to at least one of the two surfaces of the wrapping paper 12, the front and back. There are no particular restrictions on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred. Examples include alginic acid and its salts (e.g., sodium salts), polysaccharides such as pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, and nitrocellulose, starch and its derivatives (e.g., ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch, and ester derivatives such as starch acetate, starch phosphate, and starch octenyl succinate).

[Cooling section 20]
The cooling section 20 is disposed adjacent to the base material section 10 and the filter section 30, and is a member formed so that the cross section of a cylinder or the like is hollow (hollow) by wrapping the forming paper 21 around it.
The size of the cooling section 20 in the centerline direction can be changed appropriately according to the size of the product, but is usually 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. The size of the cooling section 20 in the centerline direction is usually 35 mm or less, preferably 30 mm or less, and more preferably 25 mm or less. By setting the size of the cooling section 20 in the centerline direction to be equal to or greater than the above-mentioned lower limit, a sufficient cooling effect can be ensured to obtain a good flavor, and by setting it to be equal to or less than the above-mentioned upper limit, loss due to adhesion of the generated steam and aerosol to the forming paper 21 can be suppressed.

It is desirable for the cooling section 20 to have a large interior surface area. The forming paper 21 that forms the cooling section 20 may be formed by a thin sheet of material that is wrinkled to form channels, and then pleated, gathered, and folded. The more folds or pleats within a given volume of the element, the greater the total surface area of the cooling section 20.
The thickness of the forming paper 21 is not particularly limited and may be, for example, 5 μm to 500 μm, or 10 μm to 250 μm. The material of the forming paper 21 is not particularly limited and may be, for example, a paper mainly composed of pulp, or a paper mainly composed of any of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil, or any combination thereof.

The cooling section 20 is provided with circumferential and concentric openings V (also referred to in the art as "ventilation filters (Vf)"). The openings V are located in an area through which air can flow in from outside the stick 1; in other words, in an area that protrudes from the opening 142 when the stick 1 is held in the holding section 140 of the suction device 100.

The presence of the openings V allows air to flow into the cooling section 20 from the outside during suction, lowering the temperature of the steam and air flowing in from the substrate section 10. Furthermore, by positioning the cooling section 20 within an area 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20, not only is the cooling capacity improved, but the retention of the substance (product) generated by heating within the cooling section 20 is suppressed, and the delivery amount of the product can be improved.
In addition, when the substrate 10 is heated, the vapor generated using the aerosol as condensation nuclei comes into contact with the air from outside and the temperature drops, liquefying, thereby accelerating the generation of the aerosol. The cooling unit 20 is an example of a cooling unit that cools the vapor generated by heating the substrate to generate the aerosol.

When the concentrically arranged holes V in the cooling section 20 are treated as one hole group, the number of hole groups may be one or may be two or more. When two or more hole groups are present, from the viewpoint of improving the delivery amount of components generated by heating, it is preferable that no hole group be provided in a region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20.
Furthermore, when the stick 1 is configured such that the substrate portion 10, the cooling portion 20, and the filter portion 30 are wrapped with tipping paper 40, the tipping paper 40 preferably has an opening formed directly above the opening V formed in the cooling portion 20. When producing such a stick 1, tipping paper 40 having an opening that overlaps with the opening V may be prepared and wrapped around the stick 1, but from the viewpoint of ease of production, it is preferable to produce a stick 1 without the opening V and then drill a hole that passes through both the cooling portion 20 and the tipping paper 40 at the same time.

From the perspective of improving product delivery by heating, the region where the apertures V exist is not particularly limited as long as it is a region of 4 mm or more from the boundary between the cooling section 20 and the filter section 30 toward the cooling section 20. However, from the perspective of further improving product delivery, a region of 4.5 mm or more is preferable, a region of 5 mm or more is more preferable, and a region of 5.5 mm or more is even more preferable. Furthermore, from the perspective of ensuring cooling function, the region where the apertures V exist is preferably a region of 15 mm or less, more preferably a region of 10 mm or less, and even more preferably a region of 7 mm or less.

From the viewpoint of improving product delivery by heating, the region where the apertures V exist is preferably an area of 24 mm or more from the end face on the first side of the stick 1 toward the cooling section 20, preferably an area of 24.5 mm or more, preferably an area of 25 mm or more, and more preferably an area of 25.5 mm or more. Furthermore, from the viewpoint of ensuring cooling function, the region where the apertures V exist is preferably an area of 35 mm or less, more preferably an area of 30 mm or less, and even more preferably an area of 27 mm or less.

Furthermore, when the boundary between the cooling section 20 and the substrate section 10 is used as a reference, if the size of the cooling section 20 in the centerline direction is 20 mm or more, the region where the apertures V exist is preferably a region of 5 mm or more, more preferably a region of 10 mm or more, and even more preferably a region of 13 mm or more, from the perspective of ensuring cooling function. Furthermore, from the perspective of improving product delivery by heating, the region where the apertures V exist is preferably a region of 16 mm or less, more preferably a region of 15.5 mm or less, even more preferably a region of 15 mm or less, and especially preferably a region of 14.5 mm or less, from the perspective of improving product delivery by heating.

The apertures V are provided so that the air inflow rate through the apertures V is 10% by volume or more and 90% by volume or less when inhaled at 17.5 ml/sec in an automatic smoking machine. This "air inflow rate" is the volumetric rate of air inflowing through the apertures V when the rate of air inhaled from the mouthpiece end is taken as 100% by volume. The air inflow rate is preferably 50% by volume or more and 80% by volume or less, and more preferably 55% by volume or more and 75% by volume or less. These air inflow rates can be achieved, for example, by selecting the number of apertures V per aperture group from the range of 5 to 50, selecting the diameter of the apertures V from the range of 0.1 mm to 0.5 mm, and combining these selections.
The air inflow ratio can be measured using an automatic smoking machine (for example, a single-cigarette automatic smoking machine manufactured by Borgwaldt) by a method in accordance with ISO 9512.

[Tipping Paper 40]
The composition of the tipping paper 40 is not particularly limited and can be a common embodiment, for example, one containing pulp as the main component. Pulp may be made from wood pulp such as softwood pulp or hardwood pulp, or may be made by mixing non-wood pulp commonly used in cigarette papers for tobacco products, such as flax pulp, hemp pulp, sisal pulp, or esparto. These pulps may be used alone or in any combination of two or more types in any ratio.
The tipping paper 40 may be made up of one sheet, or may be made up of multiple sheets or more.
Usable pulp types include chemical pulp produced by kraft cooking, acidic, neutral or alkaline sulfite cooking, soda cooking, etc., ground pulp, chemi-ground pulp, thermomechanical pulp, etc.
The tipping paper 40 may be manufactured by the manufacturing method described below, or may be a commercially available product.
The shape of the tipping paper 40 is not particularly limited and can be, for example, square or rectangular.

The basis weight of the tipping paper 40 is not particularly limited, but is usually 32 gsm or more and 60 gsm or less, preferably 33 gsm or more and 55 gsm or less, and more preferably 34 gsm or more and 53 gsm or less.
The air permeability of the tipping paper 40 is not particularly limited, but is usually 0 Coresta units or more and 30,000 Coresta units or less, and preferably more than 0 Coresta units and 10,000 Coresta units or less. Air permeability is a value measured in accordance with ISO 2965:2009, and is expressed as the flow rate (cm ³ ) of gas passing through an area of 1 cm ² per minute when the differential pressure between both sides of the paper is 1 kPa. 1 Coresta unit (1 Coresta unit, 1 C.U.) is cm ³ /(min·cm ² ) under 1 kPa.

In addition to the pulp mentioned above, the tipping paper 40 may contain fillers, such as metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc. It is particularly preferable that the tipping paper 40 contains calcium carbonate, in order to improve whiteness and opacity and increase the heating rate. Furthermore, these fillers may be used alone or in combination of two or more.

In addition to the pulp and fillers mentioned above, various auxiliary agents may be added to the tipping paper 40. For example, it may contain a water resistance improver to enhance water resistance. Water resistance improvers include wet strength agents (WS agents) and sizing agents. Examples of wet strength agents include urea-formaldehyde resin, melamine-formaldehyde resin, and polyamide epichlorohydrin (PAE). Examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or higher.

A coating agent may be added to at least one of the two surfaces, the front and back surfaces, of the tipping paper 40. There are no particular restrictions on the coating agent, but a coating agent that can form a film on the surface of the paper and reduce liquid permeability is preferred.
A portion of the outer surface of the tipping paper 40 may be covered with a lip release material. The lip release material refers to a material configured to help the lip and tipping paper 40 to easily separate without causing substantial sticking when the user holds the filter portion 30 of the stick 1 in their mouth. The lip release material may contain, for example, ethyl cellulose, methyl cellulose, etc. For example, the outer surface of the tipping paper 40 may be coated with the lip release material by applying an ethyl cellulose-based or methyl cellulose-based ink to the outer surface of the tipping paper 40.

[Filter section 30]
The filter unit 30 is connected to the second side of the cooling unit 20 via tipping paper 40. The tipping paper 40 connects (couples) the second-side end of the cooling unit 20 and the first-side end of the filter unit 30 by integrally winding them together.

The filter section 30 has a filter 31 as a main component.
The filter 31 is not particularly limited as long as it has the general functions of a filter. Typical filter functions include, for example, adjusting the amount of air mixed in when inhaling an aerosol, reducing flavor, and reducing nicotine and tar, but it is not necessary for the filter to have all of these functions. Furthermore, in non-combustion heating sticks 1, which tend to produce fewer components and have a lower aerosol source 11 filling rate than cigarette products, one important function is to suppress the filtering function while preventing the aerosol source 11 from falling off. The filter 31 typically has a filter material, which is formed into a cylindrical shape using a filler such as cellulose acetate fiber, acetate fiber, charcoal fiber, nonwoven fabric, or pulp paper as a filtering material. Alternatively, a paper filter filled with sheet-like pulp paper may be used.
The density of the filter material is not particularly limited, but is usually 0.10 g/cm ³ or more and 0.25 g/cm ³ or less, preferably 0.11 g/cm ³ or more and 0.24 g/cm ³ or less, and more preferably 0.12 g/cm ³ or more and 0.23 g/cm ³ or less.

The filter 31 may include a crushable additive release container (e.g., a capsule) including a crushable outer shell made of gelatin or the like. The form of the additive release container such as a capsule is not particularly limited, and any known form may be adopted. In the case of a capsule, when it is broken by the user before, during, or after use, it releases a liquid or substance (usually a flavoring agent) contained within the capsule, which is then carried by an aerosol while the stick is being used, and is dispersed into the surrounding environment after use.
The form of the capsule is not particularly limited, and may be, for example, a frangible capsule, preferably spherical in shape. The additive contained in the capsule may include any additive, but preferably includes flavoring agents and activated carbon. One or more materials that help filter the aerosol may also be added as additives. The form of the additive is not particularly limited, but is usually liquid or solid. The frangible capsule and its manufacturing method may be well known.
The flavoring agent may be, for example, menthol, spearmint, peppermint, fenugreek, clove, medium chain triglycerides (MCT), or the like, and one or a combination of these may be used.

The filter may further contain other components, such as inorganic fine powders (kaolin, talc, diatomaceous earth, quartz, calcium carbonate, barium sulfate, titanium oxide, alumina, etc.), heat stabilizers (alkali or alkaline earth metal salts, etc.), colorants, whiteness improvers, oils, retention aids, sizing agents, biodegradation or photodegradation accelerators (anatase titanium oxide, etc.), natural polymers or derivatives thereof (cellulose powder, etc.), etc. These other components may be used alone or in combination of two or more.
The cross section of the filter 31 of the filter unit 30 is substantially circular, and the diameter of the circle can be changed appropriately according to the size of the product, but is usually 4.0 mm to 9.0 mm, preferably 4.5 mm to 8.5 mm, and more preferably 5.0 mm to 8.0 mm. If the cross section is not circular, the above diameter is assumed to be the diameter of a circle having the same area as the cross section, and the diameter of that circle is applied.

The circumferential length of the cross section of the filter 31 can be changed as appropriate to suit the size of the product, but is usually 14.0 mm or more and 27.0 mm or less, preferably 15.0 mm or more and 26.0 mm or less, and more preferably 16.0 mm or more and 25.0 mm or less.
The size of the filter unit 30 in the center line direction can be changed as appropriate according to the size of the product, but is usually 5 mm to 30 mm, preferably 12.5 mm to 27.5 mm, and more preferably 15.0 mm to 25.0 mm. The shapes and dimensions of the filter 31 and other structures included in the filter unit 30 can be adjusted as appropriate so that the shape and dimensions of the filter unit 30 fall within the above ranges.

The airflow resistance per 120 mm of size in the center line direction of the filter part 30 is not particularly limited, but is usually 40 _mmH2O or more and 300 _mmH2O or less, preferably ₇₀ mmH2O or more and ₂₈₀ mmH2O or less, and more preferably 90 _mmH2O or more and 260 _mmH2O or less.
The airflow resistance is measured in accordance with the ISO standard method (ISO 6565) using, for example, a filter airflow resistance measuring device manufactured by Cerulean Co., Ltd. The airflow resistance of the filter unit 30 refers to the difference in air pressure between the first side and the second side when air is allowed to flow at a predetermined air flow rate (17.5 cc/min) from the first side to the second side without air permeating through the sides of the filter unit _30. The unit is generally expressed in mmH2O.

From the viewpoint of improving strength and structural rigidity, the filter unit 30 preferably includes a wrapper 32 for wrapping the filter 31 and the like. The form of the wrapper 32 is not particularly limited, and it may have one or more rows of seams containing adhesive. The adhesive may include a hot melt adhesive, and the hot melt adhesive may further include polyvinyl alcohol. Furthermore, when the filter segment is composed of two or more segments, it is preferable that the wrapper wrap wrapper wrap these two or more segments together.
The material of the wrapper 32 is not particularly limited, and known materials can be used, and may contain fillers such as calcium carbonate.
The thickness of the wrapper 32 is not particularly limited, but is usually 20 μm or more and 140 μm or less, preferably 30 μm or more and 130 μm or less, and more preferably 30 μm or more and 120 μm or less.
The basis weight of the paper roll 32 is not particularly limited, and is usually 20 gsm or more and 100 gsm or less, preferably 22 gsm or more and 95 gsm or less, and more preferably 23 gsm or more and 90 gsm or less.
Furthermore, the wrapper 32 may be coated or uncoated, but it is preferable to coat it with a desired material in order to provide functions other than strength and structural rigidity.

The filter section 30 may further include a center hole section having one or more hollow sections.
Figure 3(a) is a schematic diagram showing a vertical cross section of the filter part 30 of a non-combustion heating stick according to the second embodiment, including the center hole part 35. The left side of Figure 3(a) is the cooling part 20 side (first side), and the right side is the end side (second side) that the user holds in their mouth for inhalation.
The center hole portion 35 is usually disposed closer to the cooling portion 20 than the filter 31 as shown in the figure, and is preferably disposed adjacent to the cooling portion 20 .

The center hole section 35 is composed of a filling layer 33 with one or more hollow portions and an inner wrapping paper 34 covering the filling layer 33. The center hole section 35 functions to increase the strength of the filter section 30. The filling layer 33 can be, for example, a rod with an inner diameter of 1.0 mm to 5.0 mm, densely packed with cellulose acetate fibers, to which a plasticizer containing triacetin is added at a ratio of 6% to 20% by mass relative to the mass of cellulose acetate and hardened. Because the filling layer 33 has a high fiber packing density, during inhalation, air and aerosol flow only through the hollow portions, with almost no flow within the filling layer 33. Because the filling layer 33 inside the center hole section 35 is a fiber-filled layer, the feel from the outside during use is less likely to cause discomfort to the user. The center hole section 35 may not have an inner wrapping paper 34 and its shape may be maintained by thermoforming.

The center hole portion 35 and the filter 31 may be connected by, for example, an outer wrapping paper 36. The outer wrapping paper 36 may be, for example, a cylindrical piece of paper. The base material 10, the cooling unit 20, the connected center hole portion 35, and the filter 31 may also be connected by, for example, tipping paper 40. These connections can be made, for example, by applying a vinyl acetate or other adhesive to the inner surface of the outer wrapping paper 36, and then inserting the base material 10, the cooling unit 20, the connected center hole portion 35, and the filter 31 into the outer wrapping paper 36 and winding it up. These may also be connected in multiple layers using multiple papers.
The inner wrapping paper 34 and the outer wrapping paper 36 used in the center hole portion 35 may be the same as the wrapping paper 32 in terms of form, material, thickness, basis weight, etc. Also, the inner wrapping paper 34 does not have to be used.

Furthermore, the filter 31 of the filter unit 30 may be divided into two or more segments, and cavities may be formed between the filters.
Figure 3(b) is a schematic diagram showing a longitudinal cross section of the filter part 30 of a non-combustion heating stick according to a third embodiment, showing a cavity 37 formed between the filters 31. As with Figure 3(a), in Figure 3(b) the left side of the drawing is the cooling part 20 side (first side), and the right side is the end side (second side) that the user holds in their mouth to inhale.
3(b), the filter 31 is formed into two segments, with a hollow cavity 37 between the two filters. The cavity 37 is formed by wrapping the two filter segments in a desired position with the wrapping paper 32. Typically, a portion of the substrate portion 10, the cooling portion 20, and the filter portion 30 are further enclosed by tipping paper (not shown) on the outside of the wrapping paper 32.
Cavity 37 may incorporate a crushable additive release container (e.g., a capsule) that includes a crushable outer shell, such as gelatin, similar to that contained in filter 31. If one capsule is placed in cavity 37, the capsule should be no larger than 5 mm and smaller than the inner diameter of cavity 37. If two or more capsules are placed in cavity 37, the capsules should be no larger than 3.5 mm and smaller than the inner diameter of cavity 37.
A porous adsorbent such as activated carbon, which will be described later, may be placed inside the cavity 37 .

[Porous adsorbent]
In the embodiment described above, a porous adsorbent is contained in at least one of the substrate portion 10, the cooling portion 20, and the filter portion 30. The porous adsorbent is usually placed in a location in the stick 1 where it will come into contact with the aerosol. It is preferably contained in at least one of the cooling portion 20 and the filter portion 30, and it is most preferable that it be contained in at least the filter portion 30.
The porous adsorbent is not particularly limited and may be inorganic or organic. Examples of usable adsorbents include inorganic porous adsorbents such as activated carbon, sepiolite, palygorskite, zeolite, activated carbon fiber, activated alumina, sepiolite-mixed paper, silica gel, activated clay, permiculite, and diatomaceous earth. Organic porous adsorbents include polymeric porous materials such as pulp, various fibers, and ion exchange resins. These porous adsorbents may be used together with aniline compounds, hydrazine compounds, or amino compounds reactive with aldehydes, which may be adsorbed and retained in the pores of the porous adsorbent, in order to further remove flavor-deteriorating components such as aldehydes.
Among these porous adsorbents, activated carbon is preferred because it does not adversely affect the flavor and taste of the smoked product, and in some cases improves the flavor and taste of the smoked product, while at the same time being capable of adsorbing flavor-inhibiting components such as aldehydes. Activated carbon will be described below as an example.

In order to enhance the adsorption of aldehydes and the like, activated carbon preferably has a pore volume ratio of pores with a diameter of 50 nm to 5000 nm (macropores) of 15% or more relative to the total pore volume of pores with a diameter of 5000 nm or less, in order to increase the ratio of pores corresponding to the size of the aerosol particles generated by the non-combustion heating stick (usually 1 nm to 100 μm). More preferably, it is 20% or more, even more preferably 30% or more, and particularly preferably 40% or more. Furthermore, the ratio of the pore volume of pores with a diameter of 50 nm to 5000 nm is preferably 99% or less, and particularly preferably 95% or less.
The "ratio of the volume of pores having a diameter of 50 nm or more and 5000 nm or less to the volume of all pores having a diameter of 5000 nm or less" is measured as follows.
The total pore volume with a pore diameter of 5000 nm or less, and the pore size distribution of pores with a diameter of less than 2 nm (micropores) and pores with a diameter of 2 nm to 50 nm (mesopores) are measured by nitrogen gas adsorption (BET multipoint method). The total pore volume is calculated from the amount of adsorbed gas at P / P ₀ = 0.998, assuming that the pores are filled with liquid nitrogen. In addition, the cumulative pore volume with a pore diameter of 6.5 nm to 5000 nm was measured by mercury intrusion porosimetry, and the results of the two methods were combined to determine the "ratio of the pore volume with a pore diameter of 50 nm to 5000 nm to the total pore volume with a pore diameter of 5000 nm or less."

Furthermore, in order to enhance the adsorption of aldehydes and the like, and from the viewpoint of increasing the pore volume corresponding to the size of the aerosol particles generated by the non-combustion heating stick, the activated carbon preferably has a pore volume of pores with a diameter of 50 nm to 5000 nm (macropores) of 0.2 cm ³ /g to 0.9 cm ³ /g. The pore volume within the above range is more preferably 0.3 cm ³ /g or more, and particularly preferably 0.4 cm ³ /g or more. Furthermore, 0.8 cm ³ /g or less is more preferable, and 0.7 cm ³ /g or less is even more preferable.
The "pore volume of pores with a diameter of 50 nm or more and 5000 nm or less (macropores)" is determined by measuring the pore diameter distribution using mercury intrusion porosimetry.

In this embodiment, since it is better that the pore volume ratio of the activated carbon (micropores) is not too large, the ratio of the pore volume of pores with a pore diameter of 50 nm or less to the total pore volume of pores with a pore diameter of 5000 nm or less is preferably 70% or less, more preferably 65% or less. In non-combustion heating sticks, macropores with a pore diameter in the range of 50 nm to 5000 nm exert the main function of activated carbon, so even if the ratio of the pore volume of pores with a pore diameter of less than 2 nm is 0%, it may be usable.
The ratio of the pore volume having a pore diameter of less than 2 nm is determined from the pore volume of pores having a diameter of less than 2 nm (micropores) by nitrogen gas adsorption and the total pore volume having a pore diameter of 5000 nm or less by the nitrogen gas adsorption method described above.

The BET specific surface area of the activated carbon is usually 600 m ² /g or more and 1800 ^{m 2} /g or less.
Many activated carbons have a BET specific surface area of 800 m ² /g or more and 1300 ^{m 2} /g or less, and these activated carbons may be used.

The activated carbon that can be used in this embodiment preferably has a cumulative 10% by volume particle diameter (particle diameter D10) of 250 μm or more and 1200 μm or less. Furthermore, the cumulative 50% by volume particle diameter (particle diameter D50) of the activated carbon particles preferably has a cumulative 50% by volume particle diameter (particle diameter D50) of 350 μm or more and 1500 μm or less. Note that D10 and D50 are measured by laser diffraction scattering.

The method for producing activated carbon is not particularly limited. Examples of raw materials include carbonaceous materials such as wood, lignite, coal, coconut husk or shell, peat, pitch, polymer, cellulose fiber, and polymer fiber.
The raw material can be imparted with adsorption properties by any suitable process, such as physical activation or chemical activation, to produce activated carbon.
Physical activation involves converting raw materials into activated carbon using hot gases via a) carbonization, b) activation/oxidation, or c) carbonization and activation/oxidation. a) The carbonization process involves pyrolyzing the raw materials at high temperatures, typically in the range of about 600°C to about 900°C, in the absence of oxygen. b) Activation/oxidation involves exposing the carbonized material to an oxidizing atmosphere, such as steam, carbon dioxide, or oxygen, at temperatures above 250°C. Activation/oxidation temperatures typically range from about 600°C to about 1200°C. c) Carbonization and Activation/Oxidation involves both a) the carbonization process and b) the activation/oxidation process.

Chemical activation involves impregnating the raw raw material with a selected chemical, such as an acid, base, or salt, such as phosphoric acid, potassium hydroxide, sodium hydroxide, calcium chloride, or zinc chloride. The impregnated material is then carbonized, typically at a lower temperature than physical activation carbonization. For example, the temperature for chemical activation carbonization can range from about 450° C. to about 900° C. Carbonization and activation can occur simultaneously.
Activated carbon with desired pore characteristics can be produced by adjusting the raw material and a suitable physical or chemical activation process. Alternatively, a commercially available product suitable for the intended stick can be selected and used.
Examples of activated carbon that can be used in this embodiment are shown in Table 1 below, along with the main physical properties of each activated carbon.

In the table, the pore distribution is the ratio of the volume of pores with a diameter of 50 nm to 5000 nm and the ratio of the volume of pores with a diameter of less than 2 nm to the total volume of pores with a diameter of 5000 nm or less.
[Porous adsorbent placement location]
As described above, the stick 1 contains a porous adsorbent in at least one of the substrate portion 10, the cooling portion 20, and the filter portion 30. Preferably, the porous adsorbent is contained in either or both of the cooling portion 20 and the filter portion 30, but it is preferably disposed within the filter 31 of the filter portion 30. As described above, the porous adsorbent used is preferably activated carbon having the desired pore properties, etc.
The location and manner in which the porous adsorbent such as activated carbon is present are not particularly limited, but the main locations and manners in which it is present are as follows: Note that the illustration of activated carbon is omitted in Figures 1 to 3.

1) Inside the filter 31 of the filter unit 30 Activated carbon is most typically contained inside the filter 31. In this case, it is usually contained in the filter material.
1, the activated carbon may be uniformly contained within the filter, or a concentration gradient may be provided, or a higher concentration may be present at a specific location within the filter. When a concentration gradient is provided or the concentration is higher at a specific location, it is preferable to remove flavor and aroma-inhibiting components from the product at a location farther from the user, so it is preferable to have more activated carbon present on the cooling section 20 side (first side) within the filter 31.
Furthermore, when the filter 31 is composed of multiple segments, activated carbon can be present in any of the segments. However, from the viewpoint of removing aldehydes and other components that inhibit flavor and taste at a location farther from the user as described above, it is preferable to have more activated carbon present in the segment on the cooling section 20 side (first side) within the filter 31.

2) In the paper layer of the wrapping paper 32 around which the filter 31 is wound, or on the surface facing the filter 31 The activated carbon may be contained in the wrapping paper 32 around which the filter 31 is wound. In this case, it is preferable to add activated carbon having a particle size smaller than the thickness of the wrapping paper 32 when manufacturing the wrapping paper 32, and to incorporate the activated carbon into the paper layer that constitutes the wrapping paper 32.
Alternatively, the activated carbon may be disposed on the surface of the wrapper 32 facing the filter 31. In this case, the activated carbon may be attached with an adhesive to the surface of the wrapper 32 facing the filter, or when a coating agent is applied to the surface of the wrapper 32, the activated carbon may be present on the desired surface together with the coating agent during production of the activated carbon.

3) Inside the hollow portion of the filter unit 30 The activated carbon may be present inside the hollow portion of the filter unit 30. The hollow portion may be the hollow portion provided in the center hole portion 35 shown in the schematic diagram of FIG. 3( a), or may be any other hollow portion. Alternatively, the activated carbon may be present inside the hollow portion of a through-hole that penetrates the filter unit 30.
In these cases, the activated carbon may be filled in the entire hollow portion or in part of the hollow portion. When the hollow portion has an opening to the cooling portion 20 as shown in Figure 3(a), it is preferable to block the opening with thin paper, a filter material, or the like to prevent leakage into the cooling portion 20.
4) Surface Facing the Hollow Portion of the Filter Unit 30 Activated carbon may be present on the surface of the hollow portion of the filter unit 30. The hollow portion may be the hollow portion provided in the center hole portion 35 shown in FIG. 3( a) or another hollow portion. In this case, the activated carbon may be attached to the hollow portion side of the packed layer 33 in the center hole portion with an adhesive or the like, or the activated carbon may be molded to cover part or all of the hollow portion of the packed layer 33.

5) When the filter 31 has a plurality of segments, the activated carbon may be disposed in a cavity 37 formed between the segments, as shown in the schematic diagram of Fig. 3(b). In this case, the activated carbon may be filled in the cavity 37 as granular matter, or the activated carbon may be molded into the shape of the cavity and disposed in the order filter-activated carbon filter.
In FIG. 3B, the filter 31 has two segments, but the filter 31 may have three or more segments, and activated carbon may be disposed in each of a plurality of cavities 37 formed between the filters.

6) Others Activated carbon may be present in the cooling unit 20. When the cooling unit 20 has openings V, it is preferable to use activated carbon whose particle size is larger than the width of the openings V, or activated carbon that has been molded to be larger than the width of the openings V, in order to prevent the activated carbon from leaking out of the stick. A layer of a porous molded body made of activated carbon may be disposed between the cooling unit 20 and the filter unit 30 so as to cover the filter 31, or the molded body may be disposed between the cooling unit 20 and the substrate unit 10.
Alternatively, activated carbon may be present in the forming paper 21 that forms the cooling section 20. For example, activated carbon having a particle size smaller than the thickness of the forming paper 21 may be used during manufacturing so that it is present in the paper layer of the forming paper 21, or it may be attached with an adhesive to the inside of wrinkles, creases, etc. formed during forming, or it may be present together with a surface treatment agent such as a coating agent when the surface treatment agent is applied.
Furthermore, a portion of the activated carbon may be present together with the aerosol source 11 of the substrate 10, etc., so that the activated carbon comes into contact with the heating product in the substrate within the substrate.
By placing activated carbon in the stick in these locations and in these ways, it is possible to remove flavor and taste inhibiting components such as aldehydes while maintaining user satisfaction with the smoking taste in non-combustion heating type sticks that are heated to high temperatures.

[Addition of porous adsorbent]
Regarding the addition of a porous adsorbent, a preferred example in which activated carbon is used in the filter 31 will be described.
The amount of filter 31 added to the filter material per non-combustion heating stick is preferably 15.0 ^m2 /cm2 or more and 80.0 ^m2 / ^cm2 or less, as calculated by "specific surface area of activated carbon × weight of activated carbon / cross-sectional area of filter material perpendicular to the airflow direction." This value is more preferably 17.0 ^m2 / ^cm2 or more, and even more preferably 35.0 ^m2 / ^cm2 or ^more . Furthermore, it is more preferably 77.0 ^m2 / ^cm2 or less, and even more preferably 73.0 ^m2 / ^cm2 or less.
Hereinafter, for convenience, the above "specific surface area of activated carbon × weight of activated carbon / cross-sectional area of filter material in a direction perpendicular to the air flow direction" may be expressed as "surface area of activated carbon per unit cross-sectional area."
In this embodiment, by setting the surface area of activated carbon per unit cross-sectional area within the preferred range as described above, the desired amount of components generated by heating can be delivered to the user, and the desired flavor sensation can be imparted to the user. If the surface area of activated carbon per unit cross-sectional area is too small, the effect of adding activated carbon tends to be insufficient. On the other hand, if the surface area of activated carbon per unit cross-sectional area is too large, the components generated by heating tend to be reduced more than necessary.

The surface area of activated carbon per unit cross-sectional area can be adjusted by, for example, adjusting the specific surface area of activated carbon, the amount of activated carbon added, and the cross-sectional area of the filter material in a direction perpendicular to the air flow direction.
This surface area of activated carbon per unit cross-sectional area can be calculated based on the specific surface area of the activated carbon added to the filter material in one non-combustion heating stick, the weight of the added activated carbon, and the cross-sectional area of the filter material. If the filter unit 30 is composed of multiple filters 31, the cross-sectional area and length of only the filter material to which activated carbon is added are used as the basis. Note that activated carbon may not be uniformly dispersed in the added filter material, making it difficult to satisfy the above range in all cross sections of the filter material (cross sections perpendicular to the air flow direction); it is sufficient that the average value over the entire cross section is within the above range.

The amount of activated carbon added per unit length in the air passage direction of the filter material to which activated carbon has been added is preferably 5 mg/cm or more and 50 mg/cm or less, more preferably 8 mg/cm or more and 40 mg/cm or less, and even more preferably 10 mg/cm or more and 35 mg/cm or less.
The amount of activated carbon added relative to the weight of the entire filter portion 30 can be, for example, 4.0 mg to 24.0 mg, preferably 4.5 mg to 23.0 mg, and more preferably 10.5 mg to 22.0 mg.

1...non-combustion heating stick, 10...substrate portion, 11...aerosol source, 20...cooling portion, 30...filter portion, 31...filter, 33...filling layer, 35...center hole portion, 37...cavity, 40...tipping paper

Claims (4)

a substrate portion including an aerosol source;
a cooling unit that cools the vapor generated by heating the substrate unit to generate an aerosol;
a filter portion disposed in a portion through which the aerosol passes;
Equipped with
the filter of the filter unit contains activated carbon,
The activated carbon has a pore volume of 0.2 cm ³ /g or more and 0.9 cm ³ /g or less, the pore diameter of which is 50 nm or more and 5000 nm or less;
The amount of activated carbon added to the filter portion is 10.5 mg or more and 22.0 mg or less,
the value of (specific surface area of activated carbon × weight of activated carbon) / (cross-sectional area of filter in a direction perpendicular to the air flow direction) is 15.0 m ² /cm ² or more and 80.0 m ² /cm ² or less;
A non-combustion heating type stick in which the amount of activated carbon added per unit length in the air passage direction of the filter is 5 mg/cm or more and 50 mg/cm or less. 2. The non-combustion heating stick according to claim 1, wherein the activated carbon has a ratio of the volume of pores having a diameter of 50 nm to 5,000 nm to the total volume of pores having a diameter of 5,000 nm or less of 15% or more. 3. The non-combustion heating stick according to claim 1, wherein the activated carbon has a ratio of the volume of pores with a diameter of less than 2 nm to the total volume of pores with a diameter of 5000 nm or less of 70% or less. 4. The non-combustion heating stick according to claim 1 , wherein the activated carbon has a BET specific surface area of 600 m ² /g or more and 1800 m ² /g or less.